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Inventors made the first TV pictures in the 1920s. Television stations started broadcasting the first regular TV shows in the 1940s. The first TV sets had small screens and showed black and white pictures.

TV sets have become bigger. Most TVs sold today show color pictures. TV screens have become bigger and bigger while TV sets have become thinner. In fact, Plasma TV sets are so thin that you can hang them on a wall.

TV can do many things other than entertainment. TV cameras can be sent to places that are difficult or dangerous for people. They can travel to outer space. Spacecraft carry TV cameras to other planets. The cameras send back pictures that let us know what the other planets look like. TV cameras on robot submarines can go down in the sea. In medicine, doctors use tiny cameras inside the human body.